利用毫米波测云雷达反演层状云中过冷水

doi:10.11755/j.issn.1006-7639(2015)-02-0227

干旱气象

利用毫米波测云雷达反演层状云中过冷水

1. 山东省气象局大气探测技术保障中心,山东济南 250031；2.气象灾害省部共建教育部重点实验室，
南京信息工程大学，江苏南京 210044；3.山东省气象科学研究所，山东济南 250031

收稿日期:2014-09-28 出版日期:2015-04-30 发布日期:2014-11-04
作者简介:吴举秀（1974- ），女，博士，主要从事雷达气象学研究.E-mail:gurunmin@163.com
基金资助:
科技部公益性行业（气象）专项（GYHY201206038, GYHY201306040,GYHY201406033）资助

Retrieval of the Supercooled Water in Stratiform Clouds Based on Millimeter-wave Cloud Radar

1.Ensuring Center of Atmospheric Sounding Technology, Shandong Provincial Meteorology Bureau, Ji’nan 250031, China; 2.Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology,
Nanjing 210044, China; 3.Shandong Meteorological Institute, Ji’nan 250031, China

Received:2014-09-28 Online:2015-04-30 Published:2014-11-04

摘要/Abstract

摘要：

毫米波测云雷达已成为研究云内微物理参数的有效工具，利用其从混合相云中识别出过冷水，对人工影响天气及预防飞机积冰具有重要意义，对我国毫米波雷达的数据处理也具有借鉴作用。本文利用英国的35 GHz、94 GHz测云雷达，结合激光雷达和探空资料，采用阈值法，反演分析了层状云中的过冷水。结果表明:（1）毫米波雷达联合激光雷达可以识别层状云中的过冷水，其结果与微波辐射计测量的液态水路径或毫米波雷达的双峰谱相符合；（2）利用多普勒速度的双峰谱可以反演混合相云中的过冷水含量、冰晶含水量。混合相云的雷达反射率因子主要取决于冰晶，根据雷达反射率因子反演会低估云内液态水含量；（3）本次层状云降水的亮带以上含有较多过冷水，此处35 GHz的雷达回波强度随冰晶的增大而减弱，且冰晶的含水量主导了总液态水含量。

关键词: 过冷水, 毫米波雷达, 多普勒双峰谱

Abstract:

Millimeter-wave cloud radars have become an effective tool in probing the microphysical parameters of clouds. The supercooled water from stratiform clouds can be identified by using millimeter-wave cloud radar, which will be of great significance to the weather modification and the prevention of aircraft icing. This paper retrieved and analyzed the supercooled water from stratiform cloud based on the millimeter-wave cloud radars with 35 GHz and 94 GHz frequency made in England, lidar and sounding data by using the threshold method. The results are as follows: (1)The supercooled water recognized through millimeter-wave cloud radars and lidar corresponded with the liquid water path obtained by microwave radiometers or Doppler bimodal spectrum density obtained by millimeter-wave cloud radars. (2)The bimodal spectrum of Doppler velocity can be used to retrieve the supercooled water content and the ice water content. The radar reflectivity factor of mixed-phase clouds mainly depends on ice crystals, and the cloud liquid water content will be underestimated according to the reflectivity factor. (3)The supercooled water above the precipitation bright band of the stratiform cloud was more, and the bigger ice crystals decrease the echo intensity of 35 GHz radar. The liquid water content of ice crystals controls the total liquid water content of the precipitating clouds.

Key words: supercooled water, millimeter-wave cloud radar, bimodal spectrum of Doppler velocity

中图分类号:

P412.25

吴举秀1，魏鸣2，王以琳3. 利用毫米波测云雷达反演层状云中过冷水[J]. 干旱气象, DOI: 10.11755/j.issn.1006-7639(2015)-02-0227.

WU Juxiu1, WEI Ming2, WANG Yilin3. Retrieval of the Supercooled Water in Stratiform Clouds Based on Millimeter-wave Cloud Radar[J]. Journal of Arid Meteorology, DOI: 10.11755/j.issn.1006-7639(2015)-02-0227.

利用毫米波测云雷达反演层状云中过冷水

Retrieval of the Supercooled Water in Stratiform Clouds Based on Millimeter-wave Cloud Radar

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

编辑推荐

Metrics